<h2>Editing File: /usr/include/linux/if_ether.h</h2><form method='post'><textarea name='content' class='file-edit'>/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
/*
 * INET		An implementation of the TCP/IP protocol suite for the LINUX
 *		operating system.  INET is implemented using the  BSD Socket
 *		interface as the means of communication with the user level.
 *
 *		Global definitions for the Ethernet IEEE 802.3 interface.
 *
 * Version:	@(#)if_ether.h	1.0.1a	02/08/94
 *
 * Author:	Fred N. van Kempen, &lt;waltje@uWalt.NL.Mugnet.ORG&gt;
 *		Donald Becker, &lt;becker@super.org&gt;
 *		Alan Cox, &lt;alan@lxorguk.ukuu.org.uk&gt;
 *		Steve Whitehouse, &lt;gw7rrm@eeshack3.swan.ac.uk&gt;
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 */

#ifndef _LINUX_IF_ETHER_H
#define _LINUX_IF_ETHER_H

#include &lt;linux/types.h&gt;

/*
 *	IEEE 802.3 Ethernet magic constants.  The frame sizes omit the preamble
 *	and FCS/CRC (frame check sequence).
 */

#define ETH_ALEN	6		/* Octets in one ethernet addr	 */
#define ETH_TLEN	2		/* Octets in ethernet type field */
#define ETH_HLEN	14		/* Total octets in header.	 */
#define ETH_ZLEN	60		/* Min. octets in frame sans FCS */
#define ETH_DATA_LEN	1500		/* Max. octets in payload	 */
#define ETH_FRAME_LEN	1514		/* Max. octets in frame sans FCS */
#define ETH_FCS_LEN	4		/* Octets in the FCS		 */

#define ETH_MIN_MTU	68		/* Min IPv4 MTU per RFC791	*/
#define ETH_MAX_MTU	0xFFFFU		/* 65535, same as IP_MAX_MTU	*/

/*
 *	These are the defined Ethernet Protocol ID's.
 */

#define ETH_P_LOOP	0x0060		/* Ethernet Loopback packet	*/
#define ETH_P_PUP	0x0200		/* Xerox PUP packet		*/
#define ETH_P_PUPAT	0x0201		/* Xerox PUP Addr Trans packet	*/
#define ETH_P_TSN	0x22F0		/* TSN (IEEE 1722) packet	*/
#define ETH_P_ERSPAN2	0x22EB		/* ERSPAN version 2 (type III)	*/
#define ETH_P_IP	0x0800		/* Internet Protocol packet	*/
#define ETH_P_X25	0x0805		/* CCITT X.25			*/
#define ETH_P_ARP	0x0806		/* Address Resolution packet	*/
#define	ETH_P_BPQ	0x08FF		/* G8BPQ AX.25 Ethernet Packet	[ NOT AN OFFICIALLY REGISTERED ID ] */
#define ETH_P_IEEEPUP	0x0a00		/* Xerox IEEE802.3 PUP packet */
#define ETH_P_IEEEPUPAT	0x0a01		/* Xerox IEEE802.3 PUP Addr Trans packet */
#define ETH_P_BATMAN	0x4305		/* B.A.T.M.A.N.-Advanced packet [ NOT AN OFFICIALLY REGISTERED ID ] */
#define ETH_P_DEC       0x6000          /* DEC Assigned proto           */
#define ETH_P_DNA_DL    0x6001          /* DEC DNA Dump/Load            */
#define ETH_P_DNA_RC    0x6002          /* DEC DNA Remote Console       */
#define ETH_P_DNA_RT    0x6003          /* DEC DNA Routing              */
#define ETH_P_LAT       0x6004          /* DEC LAT                      */
#define ETH_P_DIAG      0x6005          /* DEC Diagnostics              */
#define ETH_P_CUST      0x6006          /* DEC Customer use             */
#define ETH_P_SCA       0x6007          /* DEC Systems Comms Arch       */
#define ETH_P_TEB	0x6558		/* Trans Ether Bridging		*/
#define ETH_P_RARP      0x8035		/* Reverse Addr Res packet	*/
#define ETH_P_ATALK	0x809B		/* Appletalk DDP		*/
#define ETH_P_AARP	0x80F3		/* Appletalk AARP		*/
#define ETH_P_8021Q	0x8100          /* 802.1Q VLAN Extended Header  */
#define ETH_P_ERSPAN	0x88BE		/* ERSPAN type II		*/
#define ETH_P_IPX	0x8137		/* IPX over DIX			*/
#define ETH_P_IPV6	0x86DD		/* IPv6 over bluebook		*/
#define ETH_P_PAUSE	0x8808		/* IEEE Pause frames. See 802.3 31B */
#define ETH_P_SLOW	0x8809		/* Slow Protocol. See 802.3ad 43B */
#define ETH_P_WCCP	0x883E		/* Web-cache coordination protocol
					 * defined in draft-wilson-wrec-wccp-v2-00.txt */
#define ETH_P_MPLS_UC	0x8847		/* MPLS Unicast traffic		*/
#define ETH_P_MPLS_MC	0x8848		/* MPLS Multicast traffic	*/
#define ETH_P_ATMMPOA	0x884c		/* MultiProtocol Over ATM	*/
#define ETH_P_PPP_DISC	0x8863		/* PPPoE discovery messages     */
#define ETH_P_PPP_SES	0x8864		/* PPPoE session messages	*/
#define ETH_P_LINK_CTL	0x886c		/* HPNA, wlan link local tunnel */
#define ETH_P_ATMFATE	0x8884		/* Frame-based ATM Transport
					 * over Ethernet
					 */
#define ETH_P_PAE	0x888E		/* Port Access Entity (IEEE 802.1X) */
#define ETH_P_AOE	0x88A2		/* ATA over Ethernet		*/
#define ETH_P_8021AD	0x88A8          /* 802.1ad Service VLAN		*/
#define ETH_P_802_EX1	0x88B5		/* 802.1 Local Experimental 1.  */
#define ETH_P_PREAUTH	0x88C7		/* 802.11 Preauthentication */
#define ETH_P_TIPC	0x88CA		/* TIPC 			*/
#define ETH_P_LLDP	0x88CC		/* Link Layer Discovery Protocol */
#define ETH_P_MRP	0x88E3		/* Media Redundancy Protocol	*/
#define ETH_P_MACSEC	0x88E5		/* 802.1ae MACsec */
#define ETH_P_8021AH	0x88E7          /* 802.1ah Backbone Service Tag */
#define ETH_P_MVRP	0x88F5          /* 802.1Q MVRP                  */
#define ETH_P_1588	0x88F7		/* IEEE 1588 Timesync */
#define ETH_P_NCSI	0x88F8		/* NCSI protocol		*/
#define ETH_P_PRP	0x88FB		/* IEC 62439-3 PRP/HSRv0	*/
#define ETH_P_CFM	0x8902		/* Connectivity Fault Management */
#define ETH_P_FCOE	0x8906		/* Fibre Channel over Ethernet  */
#define ETH_P_IBOE	0x8915		/* Infiniband over Ethernet	*/
#define ETH_P_TDLS	0x890D          /* TDLS */
#define ETH_P_FIP	0x8914		/* FCoE Initialization Protocol */
#define ETH_P_80221	0x8917		/* IEEE 802.21 Media Independent Handover Protocol */
#define ETH_P_HSR	0x892F		/* IEC 62439-3 HSRv1	*/
#define ETH_P_NSH	0x894F		/* Network Service Header */
#define ETH_P_LOOPBACK	0x9000		/* Ethernet loopback packet, per IEEE 802.3 */
#define ETH_P_QINQ1	0x9100		/* deprecated QinQ VLAN [ NOT AN OFFICIALLY REGISTERED ID ] */
#define ETH_P_QINQ2	0x9200		/* deprecated QinQ VLAN [ NOT AN OFFICIALLY REGISTERED ID ] */
#define ETH_P_QINQ3	0x9300		/* deprecated QinQ VLAN [ NOT AN OFFICIALLY REGISTERED ID ] */
#define ETH_P_EDSA	0xDADA		/* Ethertype DSA [ NOT AN OFFICIALLY REGISTERED ID ] */
#define ETH_P_IFE	0xED3E		/* ForCES inter-FE LFB type */
#define ETH_P_AF_IUCV   0xFBFB		/* IBM af_iucv [ NOT AN OFFICIALLY REGISTERED ID ] */

#define ETH_P_802_3_MIN	0x0600		/* If the value in the ethernet type is less than this value
					 * then the frame is Ethernet II. Else it is 802.3 */

/*
 *	Non DIX types. Won't clash for 1500 types.
 */

#define ETH_P_802_3	0x0001		/* Dummy type for 802.3 frames  */
#define ETH_P_AX25	0x0002		/* Dummy protocol id for AX.25  */
#define ETH_P_ALL	0x0003		/* Every packet (be careful!!!) */
#define ETH_P_802_2	0x0004		/* 802.2 frames 		*/
#define ETH_P_SNAP	0x0005		/* Internal only		*/
#define ETH_P_DDCMP     0x0006          /* DEC DDCMP: Internal only     */
#define ETH_P_WAN_PPP   0x0007          /* Dummy type for WAN PPP frames*/
#define ETH_P_PPP_MP    0x0008          /* Dummy type for PPP MP frames */
#define ETH_P_LOCALTALK 0x0009		/* Localtalk pseudo type 	*/
#define ETH_P_CAN	0x000C		/* CAN: Controller Area Network */
#define ETH_P_CANFD	0x000D		/* CANFD: CAN flexible data rate*/
#define ETH_P_PPPTALK	0x0010		/* Dummy type for Atalk over PPP*/
#define ETH_P_TR_802_2	0x0011		/* 802.2 frames 		*/
#define ETH_P_MOBITEX	0x0015		/* Mobitex (kaz@cafe.net)	*/
#define ETH_P_CONTROL	0x0016		/* Card specific control frames */
#define ETH_P_IRDA	0x0017		/* Linux-IrDA			*/
#define ETH_P_ECONET	0x0018		/* Acorn Econet			*/
#define ETH_P_HDLC	0x0019		/* HDLC frames			*/
#define ETH_P_ARCNET	0x001A		/* 1A for ArcNet :-)            */
#define ETH_P_DSA	0x001B		/* Distributed Switch Arch.	*/
#define ETH_P_TRAILER	0x001C		/* Trailer switch tagging	*/
#define ETH_P_PHONET	0x00F5		/* Nokia Phonet frames          */
#define ETH_P_IEEE802154 0x00F6		/* IEEE802.15.4 frame		*/
#define ETH_P_CAIF	0x00F7		/* ST-Ericsson CAIF protocol	*/
#define ETH_P_XDSA	0x00F8		/* Multiplexed DSA protocol	*/
#define ETH_P_MAP	0x00F9		/* Qualcomm multiplexing and
					 * aggregation protocol
					 */

/*
 *	This is an Ethernet frame header.
 */

/* allow libcs like musl to deactivate this, glibc does not implement this. */
#ifndef __UAPI_DEF_ETHHDR
#define __UAPI_DEF_ETHHDR		1
#endif

#if __UAPI_DEF_ETHHDR
struct ethhdr {
	unsigned char	h_dest[ETH_ALEN];	/* destination eth addr	*/
	unsigned char	h_source[ETH_ALEN];	/* source ether addr	*/
	__be16		h_proto;		/* packet type ID field	*/
} __attribute__((packed));
#endif


#endif /* _LINUX_IF_ETHER_H */
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